#!/bin/sh

HGMERGE=true; export HGMERGE

echo '# basic operation'

hg init basic

cd basic

echo a > a

hg commit -d '0 0' -A -m a

echo b >> a

hg commit -d '1 0' -m b

hg backout -d '2 0' tip

cat a

echo '# file that was removed is recreated'

cd ..

hg init remove

cd remove

echo content > a

hg commit -d '0 0' -A -m a

hg rm a

hg commit -d '1 0' -m b

hg backout -d '2 0' --merge tip

cat a

echo '# backout of backout is as if nothing happened'

hg backout -d '3 0' --merge tip

cat a 2>/dev/null || echo cat: a: No such file or directory

echo '# backout with merge'

cd ..

hg init merge

cd merge

echo line 1 > a

hg commit -d '0 0' -A -m a

echo line 2 >> a

hg commit -d '1 0' -m b

echo line 3 >> a

hg commit -d '2 0' -m c

hg backout --merge -d '3 0' 1

hg commit -d '4 0' -m d

cat a

echo '# backout should not back out subsequent changesets'

hg init onecs

cd onecs

echo 1 > a

hg commit -d '0 0' -A -m a

echo 2 >> a

hg commit -d '1 0' -m b

echo 1 > b

hg commit -d '2 0' -A -m c

hg backout -d '3 0' 1

hg locate b

cd ..

hg init m

cd m

echo a > a

hg commit -d '0 0' -A -m a

echo b > b

hg commit -d '1 0' -A -m b

echo c > c

hg commit -d '2 0' -A -m b

hg update 1

echo d > d

hg commit -d '3 0' -A -m c

hg merge 2

hg commit -d '4 0' -A -m d

echo '# backout of merge should fail'

hg backout 4

echo '# backout of merge with bad parent should fail'

hg backout --parent 0 4

echo '# backout of non-merge with parent should fail'

hg backout --parent 0 3

echo '# backout with valid parent should be ok'

hg backout -d '5 0' --parent 2 4

hg rollback

hg update -C

hg backout -d '6 0' --parent 3 4

exit 0